If excel documents are loading extremely slow, you may want to try enabling the “Lookup Wizard” add-in.
In Excel 2007:
1. Click the ribbon, select Excel Options, and click Add-Ins
2. In the “Manage:” drop down, ensure that “Excel Add-ins” is selected, and click the Go button
3. Place a checkmark in the “Lookup Wizard” checkbox. A short installation to install the add-in will follow.
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